class_docstr: L2 normalization
class_docstr_tok: ["L2","normalization"]
code: def check_type_forward(self, in_types):
      type_check.expect(in_types.size() == 1)
      (x_type,) = in_types
  
      type_check.expect(x_type.dtype.kind == "f")
  
file_path: chainer/chainer/functions/normalization/l2_normalization.py
imports: import six
  from chainer import backend
  from chainer import function_node
  import chainer.functions
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the NormalizeL2 obj's underlying member method code with example usage: obj.check_type_forward(in_types) without return types